Equalizing-support for molders&#39; flasks.



J. T. RAMSDEN.

EQUALIZING SUPPORT FOR MOLDEPUS PLASKS.

APPLICATION FILED MAR.22, 1912.

1,050,293. Patented Jan. 14, 1913.

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J. T. RAMSDEN.

EQUALIZING SUPPORT FOR MOLDERS' FLASKS.

APPLICATION FILED MAR. 22, 1912. I

, Patented Jan. 14, 1913.

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COLUMBIA ILANOGRAPH CD.,\VASHINGTON, n. c.

UNITED PAEN FFIQFIQ JOHN T. BAMSDEN, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE TABOR MANUFACTURING COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORA- TION OF PENNSYLVANIA.

EQUALIZING-SUPPOBT FOR MOLDERS FLASKS.

Specification of Letters Patent.

Application filed March 22, 1912.

To all whom it may concern:

Be it known that I, JOHN T. RAMSDEN, a citizen of the United States, residing at the city of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented a new and useful Equalizing Support for Molders Flasks, of which the following is a specification.

The principal object of the present invention is to provide simple and eiiicient means for holding or supporting the bottom board, flask and sand mold in proper relation to the pattern and pattern board after they have been rolled over into position for withdrawing the pattern so that the bottom board, flask and sand mold are held in fixed lateral relation to the pattern, pattern board and their guides while the pattern is drawn and thus insure as far as possible a clean unbroken edge at the sand mold; to compensate in the support for irregularities in or distortions of the pattern board, flask and bottom board, such as are due to heat, moisture and rough handling and which would cause the bottom board to present an uneven surface or base upon which to support the mold, thus making it diiiicult to keep the surface of the mold in contact with the surface of the pattern board; and to facilitate and improve the operation of the wedges which support the bottom board, flask and sand mold as well as the means by which these wedges are operated.

The invention will be claimed at the end hereof but will be first described in connection with the embodiment, but not the only embodiment, of it chosen for illustration in the accompanying drawings in which Figure 1, is a side elevation of a part of a molding machine fitted with an equalizing device embodying features of the invention. Fig. 2, is an end View of the same. Fig. 3, is a top or plan view, partly in section, of an equalizing support embodying features of the invention, and Fig. 4, is a view, principally in central section, of the same.

In the drawings 1, is a base or runway.

2 and 3, are opposed taper wedges movable along the base or runway. 1, is a wedge shifting device connected with and carried by the opposed wedges and adapted to shift them in opposite directions and permit either wedge to operate as an abutment in shifting the other. The device 4:, is shown to com- Patented Jan. 14, 1913.

Sem'al No. 685,543.

prise a complemental piston 5, and cylinder 6, of which the piston is connected with the wedge 3, by a pin 7 and the cylinder is connected with the wedge 2, by a pin 8.

9, is a passage for the fluid as air, water or the like for actuating the piston and cylinder. V

10, is a connection some part of which may be flexible and which is provided with a valve 11, conveniently located for the use of the operator.

13, is a spring having one end connected with the piston and the other end with the cylinder and tending to draw the latter into the former.

The elements 2 and 3, obtain their wedging action when fluid is let into the cylinder and overcoming the spring 13, separates the elements on the runway, which being oppositely inclined, causes them to rise and thus block or wedge up the flask as is hereinafter described.

The invention is not intended to be limited to the described wedge shifting device as it is but one embodiment of mechanism, other embodiments of which are intended to be included in the invention.

In connection with the machine selected merely for illustration in Figs. 1 and 2, two bases or runways 1, each having its opposed wedges and being duplicates of each other are shown. In this case the opposed wedges of each runway are connected by bars 24, having a common wedge shifting mechanism 4.

The runways are mounted on rods 14, guided in ways 15, in the frame a, of the machine.

16, is a rock shaft having three arms of which the arms 17, are connected by links 17 with a shaft 18, spanning the runways, and of which the arm 19, is operated upon by a screw 25, driven by the toothed wheels 20. The toothed Wheels 20, are driven from the hand wheel 21, by means of toothed wheels 22, and the shaft 23. The hand wheel 21, and the valve 11, may be arranged close together while the parts which they operate are at a distance and may be in a pit or otherwise not easily accessible.

In operation the flask b, with its bottom stops 6. lhe runways are properly positioned by the hand wheel 21, and the mechanism which it operates. The wedges are then shifted, for example, by means of the valve 11, and its connections. The wedge which first contacts with the bottom board 6 operates as an abutment for the other wedge or perhaps more accurately for the force which is operating between the wedges, in the present instance, the piston and cylinder. In this way irregularities, if any, in the mold board 6 are compensated for and the mold is evenly and firmly supported, so that when the head f, rises the arms 0, draw the pattern properly from the sand mold.

What I claim is:

1. rain equalizing support for bottom boards and flasks comprising the combination of a base or runway, opposed taper wedges movable along the base or runway, and a wedge shifting device connected with and carried by the Opposed wedges and adapted to shift them in opposite directions and permit either wedge to operate as an abutment in shifting the other.

2. An equalizing; support for molders flasks comprising the combination of a base or runway, wedges movable along the base or runway, a fluid cylinder and piston for operating the wedges, and means for raising; and lowering the runway, substantially as described.

In testimony whereof I have hereunto signed my name.

JOHN T. RAMSDEN.

Witnesses:

It. RAYMOND PORTER, H. W. BROWN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

